Demounting device.



W. N. BOOTH.

DEMOUNTJNG DEVICE. APPLICATION FILED JUNE 14. 1910.

1,146,301, Patented July 13, 1915 2 SHEETS-SHEET L W. N. BOOTH.

DEMQUNTTNG DEVICE. APPLICATION FILED JUNE 14, 1910.

1,146,301 Patented July 13, 1915. r

2 SHEETS-SHEET 2.

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Wine J Y Z UNITED 'STATEd PATENT @FFTQE.

WILLIAM Na BOOTH, CLEVELAND, OHIO, ASS I GNOR TO THE BOOTH DEMOUNTABLERIM COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

.Dnrromfrnve nnvrcn.

Application filed June 14, 1910. Serial No. 566,753.

To'aZZ vhom it may concern:

'Be 1t known that I, WILLIAM N. BOOTH,

- a citizen of the United States, and resident of Cleveland, in thecounty of Cuyahoga' and State of Ohio, have invented certain new anduseful Improvements in Demounting Devices, of which I hereby declare thefollowing who a 'full, clear, and exact description, such as will enablebthers skilled in the art to which it appertains to make and "use thesame.

The objects of the invention are to provide equalizing devices :forapplying trans:

verse pressure in opposite directions s1mul-- taneously to adjacentmembersof a demountable rim, for the purposeof attaching the outer'rimto the inner rim which is mounted on'the felly of an automobile wheeland forremovingthe outer rim therefrom. These equalizing devices forapplying power to the said rim are also so spaced apart upon the rim andso constructed as to produce a circumferential pressure upon a rigidinner rim of the wheel member which is mounted on the felly. Thispressure is applied at regular intervals in such a manner as to causethe outer rim to'buckle inwardly at points intermediately between theequalizing devices, and thus insure the positive engagement of,the rimsat intermediate points as well. as'at the points of engagement of theequalizing devices.

The invention comprises also the construction of the engaging members ofsheet metal to obtain lightness thereof and providing them with inclinedor wedging surfaces to produce the circumferential pressure described.The invention is also an improvement upon the invention described inLetters Patout .No. 954.416, for demountable rim for automobile tires,granted to me on April 12, 1910, in which equalizing devices of similarcharacter were shown constructed of solid metal, and incapableofexerting the circumf'erent ial pressure herein described. Theinvention comprising the combination and arrangement of parts andconstruction of details as hereinafter described, shown in theaccompanying drawings and specifically pointed out in the claims. In theaccompanying drawings Figure 1 is a side elevation of the device; Fig. 2is a transverse section, taken eircumferentiallybetween the outer andinner rim members.

\ showing one equalizing pressure device mounted upon the inner rimmember, and the sheet metal blocks simultaneously engaged thereby tooperate the other rim member; Fig. 3 is a longitudinal vertical sectionthrough the rim members showing the de- 'tail construction of one of theequalizing devices; Fig. 4 is a similar longitudinal sec tion showingtwo equalizing devices and their effect in buckling the outer rim by.

means of the circumferential pressure thereon caused by the action ofthe wedging blocks in the equalizing devices;v Fig. 5 is a transversesection taken through the tire and mm and through a pair of-compressionwedges; Fig. 6 is a perspective view of one of the wedges attached tothe outer rim; Fig. 7 is a similar view of one of the wedge shapedplatforms upon which the worm gears of the equalizing device is mounted.

' In these views 1 is the outer rim member which is attached inany'conve'ment manner to the pneumatic tire 2. 3 is the inner rim membermounted on the telly 4 of the wheel. The rim 1 is of slightly largerdiam eter than the periphery of the inner rim, so that when compressedat one point it will project at another point as shown in Fig. 4.

The rim-3 is channel shaped in cross section and rigid as shown in Fig.5 and formed of thin spring metal such as thin steel and secured withinthe channel at regullar intervals, and preferably three in num berare'the pressure applying and equalizing devices by means of which therim members are forcibly separated and drawn-together. These devicesea'ch consist of the worm screw 5 mounted in the sides of the channel,upon each side of which is shown a worm wheel or disk 6 engagingtherewith, each wheel is? mounted upon a sheet metal platform'7, thewheels being closely adjacent and pivoted in the platforms at 8, 8.

' The wheels are mounted upon a plane sub- I stantially at right anglesto the radius pas's ing through the worm screw 4 and each platform isprovided with a lateral extension 9 at each end joining the platforms ata slight angle and having inclined faces,

1 see Fig. 5. Upon the lateral extensions 9, 9

move the sheet metal blocks or hollow lugs 10, 10, which are attached tothe outer rim members 1, and have inclined faces corresponding to theinclined faces of the platform, and" enter the channel of the inner rimthrough the lateral openings 11, 11 in one wall thereof; each block 10is provided with a lateral extension 13 engaged in turn by the shoulders12, 12 upon the worm wheels, which to give a compact form to the deviceare formed in the ends of a recess 14, in each worm wheel. A squared andprojecting extremity T for the worm screw serves to operate the same.

The engaging surfaces of the platforms 7, 7, and hollow sheet metal lugs10, 10, are oppositely inclined, as shown in Fig. 5, so that whenviorced together a strong pressure is exerted to force the rims apart,and

' to force the inner rim upon the folly of the wheel, in a radialdirection. Each worm screw is moved in turn to operate its respectiveequalizing device until all are tightly secured and the rims are broughtinto line with each other at their outer edges. The eflect of thisaction is to spring or buckle inwardly the intermediate portions of theouter rim so as to engage with the inner rim between the equalizingdevices as shown at L Fig. 4 and thus bind the rims together at theintermediate points of contact of the wedging blocks.

The platform and wedge blocks 10, 10,

' as stated are formed of sheet metal such as steel, and are providedwith ii'itegral rivets R, R, which are riveted over openings S, S in therims.

The wedge blocks or hollow sheet metal lugs 10, 10 are shown smaller attheir, inner ends than at their outer ends so that they can be readilyinserted in the openings in the channel rim, and their outer endscompletely fill these openings when they are in place, and the parts aresecured together.

The various forms of construction may be changed to some extent withoutdeparting from the principle of action herein described and will bewithin the scope of the claims.

Having described the invention what I claim as new and desire to secureby Letters Patent is:

1. In a demounting device for the 'rim and tire of an automobile wheel,a rigid inner rim, and an outer rim encircling said inner rim, spacedsheet metal blocks on the inner face of said outer rim having inclinedinner engaging surfaces, sheet metal platforms having correspondinginclined engaging surfaces on said inner rim, means for bringing saidinclined engaging surfaces of said rims tightly together, and therebyexerting pressure upon both of said rims, whereby said outer rim willspring or buckle and engage the other rim intermediate of said engagingsurfaces of said rims.

2. In a demounting device for the tire and rim of an automobile wheel,in combi nation with the rim and its tire, an inner channel shaped rim,pairs of sheet metal projections upon the inner side of said outer rim,said pairs of projections spaced apart thereon and having inclined innerfaces, corresponding sheet metal inclined surfaces inclosed in thechannel shaped inner rim, an equalizing power device inclosed in theinner rim for each pair of projections and adapted to engage and movesaid pair of projections and outer rim laterally on the inner rim and tobring said rims into and out oi line with each other and to force saidengaging inclined surfaces on said rims over each other.

3. In a demounting device, an outer rim and an inner channel shapedmetal rim, a series of worm screws mounted in the sides of the innerrim, a pair of worm wheels, in said channeled rim engaging oppositesides of each worm screw, a pair of transversely and inwardly pointinglugs upon said outer rim for each Worm wheel, each worm wheel providedwith shoulders adapted to engage its adjacent lug alternately, said lugsprovided with inclined faces, and said inner rim provided withcorresponding inclined members inclosed in said channels, adapted toengage the inclined faces on said lugs.

In testimony whereof, I hereunto set my hand this 17 day of May 1910.

/ WILLIAM n. eoo'rn In presence of WM. M. Mormon, M. G. NORTON.

